WO1992014088A1 - Agencement d'etancheite pour vanne de dosage - Google Patents

Agencement d'etancheite pour vanne de dosage Download PDF

Info

Publication number
WO1992014088A1
WO1992014088A1 PCT/US1992/000476 US9200476W WO9214088A1 WO 1992014088 A1 WO1992014088 A1 WO 1992014088A1 US 9200476 W US9200476 W US 9200476W WO 9214088 A1 WO9214088 A1 WO 9214088A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
fluid
bore
groove
sleeve
Prior art date
Application number
PCT/US1992/000476
Other languages
English (en)
Inventor
Larry Alexander Portolese
Original Assignee
Allied-Signal Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allied-Signal Inc. filed Critical Allied-Signal Inc.
Priority to JP4505391A priority Critical patent/JPH06505324A/ja
Publication of WO1992014088A1 publication Critical patent/WO1992014088A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths

Definitions

  • a SEAL ARRANGEMENT FOR A METERING VALVE This invention related to a seal arrangement for a metering valve.
  • the seal arrangement has a cylindrical member with a groove for locating an elastomeric member which has a projection that extends above a face on the cylindrical member.
  • a retaining ring is resiliently urged against the elastomeric member by a ceramic sleeve which has a plurality of openings connected to an outlet port.
  • a ceramic piston has a flange with first and second ribs separated by a recess.
  • An actuator moves the piston to a closure position where the first rib engages the projection while a second rib engages the seat to prevent flow of fluid between an inlet port and the outlet port.
  • the recess allows the elastomeric material to flow without damage when the piston is in the closure position.
  • U.S. Patent 4,876,857 discloses a shut off/pressure regulating valve for a turbine engine wherein a sealing arrangement allows for substantially friction free operation and terminates the flow of fuel when the turbine is in a shut off condition.
  • the present invention provides a seal arrangement for a metering valve with an integral shut off wherein the possibility of damage to an elastomeric member has been reduced and essentially eliminated.
  • the metering valve housing has a bore with an inlet port connected to a source of fluid and an outlet port connected to a turbine.
  • a cylindrical member is positioned against a shoulder in the bore by an end cap.
  • the cylindrical member has a face with a first groove located adjacent adjacent a seat.
  • An elastomeric member having a base with projection extending therefrom is located in the groove adjacent the seat.
  • a projection on the elastomeric member extends past the face.
  • a retaining ring is resiliently urged against the base of the elastomeric member by the end of a sleeve.
  • a plurality of openings in the sleeve adjacent the end define a flow path between the seat and the outlet port.
  • a piston located in said sleeve and connected to an actuation member has a flange with first and second ribs thereon separated by a recess.
  • the actuation member moves the piston toward a closure position
  • the first rib engages the projection to compress the elastomeric material prior to the second rib engaging the seat and the first rib engaging the ring to terminate fluid communication between the inlet port and outlet port.
  • the elastomeric member flows into the recess in the flange of the piston to create a static seal between said piston and cylindrical member and thereby assure that fluid communication is completely terminated.
  • An advantage of this invention occurs through the simplicity of the integration of a metering valve with an operational piston responsive to an input actuator to control the flow of fluid between an input port and an exit port through the sequential enagagement of a resilient member and seat to completely terminate fluid communication from the inlet port to an outlet port.
  • Figure 1 is a metering valve having an integral shut off valve with a seal arrangement made according to the principles of this invention
  • Figure 2 is a enlarged view of a portion of the seal arrangement of Figure 1;
  • Figure 3 is an enlarged view of a portion of the seal arrangement of Figure 1 when initially positioned in the bore of the metering valve;
  • Figure 4 is an enlarged view of a portion of the seal arrangement of Figure 1 with the piston located in a position to allow fluid communication between the inlet port and the exit port in the metering valve.
  • the metering valve 10 shown in Figure 1 is designed as part of a fuel system for a turbine engine for use in an aircraft.
  • the metering valve 10 has an actuation solenoid 12 which is controlled by an input signal from an electronic control unit 15 to meter fuel to the combustion chamber in the turbine.
  • the metering valve 10 has a housing 16 with a stepped bore 18 connected to a source of fuel 24 through an inlet port 20 and to the combustion chamber of the turbine through an outlet or exit port 22.
  • a shoulder 26 in bore 18 separates the inlet port 20 and the outlet port 22.
  • An annular shield 28 is located in bore 18 against shoulder 26 to guide or direct fluid into the outlet port 22 prior to the placement of a cylindrical body 30 in bore 18.
  • the cylindrical body 30 forms the closure seat for the metering valve and an entrance cone for guiding or directing the flow of fluid from the inlet port 20 to the outlet port 22.
  • the cylindrical body 30 has a peripheral surface 36 which engages bore 18 and first and second faces 32 and 34 which are located in planes perpendicular to bore 18.
  • Face 32 has a groove 38 and a rib or ledge 40 thereon.
  • An elastomeric material 42 has a base that is located in groove 38 and a projection 44 that extends past face 32 on cylindrical member 30.
  • a retainer ring 46 made of a hard plastic material such as Teflon, initially has a portion that is located in the groove 38 and a portion that extends past face 32 as shown in Figure 3.
  • An end cap 48 has a cylindrical body 50 that extends into bore 18 and engages face 34 on cylindrical body 30 to hold annular shield 28 against shoulder 26.
  • Cylindrical body 50 has a series of openings or slots 52, 52'...52 n through which fluid is communicated from inlet port 20 to the cone surface 31 on the interior of cylindrical body 30.
  • Head 54 on end cap 48 is attached to housing 14 by the threads 56 and a seal 58 located in a groove in housing 16 assures that fluid from inlet port 20 is retained in bore 18.
  • a ceramic sleeve 60 located in bore 18 has a first end 62 that extends into bore 18 and sets on ledge or rib 40 on face 32 of cylindrical member 30 and a second end 64.
  • a resilient member 66 in the form of a wave washer is located in bore 18 adjacent to the second end 64 of sleeve 60.
  • a snap ring 68 connected to housing 16 holds sleeve 60 in bore 18 while resilient member 66 provides sufficient force such that the first end 62 urges retainer ring 46 into groove 46 as shown in Figure 4 and forms a static seal between ring 46, end 62 and the elastomeric member 42.
  • Sleeve 60 has a plurality of openings 61 (only one is shown) that connect bore 18 to outlet or exit port 22.
  • a shaft 70 that extends from actuation solenoid 12 has an end 76 located in bore 18.
  • a nut 78 attached to end 76 acts on resilient member or wave washer 80 to position hub 86 on piston 72 against stop ring 74 on shaft 70.
  • Piston 72 which is also made from a ceramic material has a cylindrical body 88 which is located in the ceramic sleeve 60.
  • Cylindrical body 88 has a flange with a first rib 90 connected to or separated from a second rib 92 by an annular recess or groove 94, as more clearly shown in Figure 2.
  • Hub 86 has a plurality of openings 82 and 84 which allows fluid communication between the inlet port 20 and the interior of sleeve 60 to provide for a balance force across piston 72.
  • Seal 94 retained in housing 14 of the actuation solenoid 12 surrounds shaft 70 to retain fluid or fuel presented to bore 18 on housing 16 after housing 14 is connected to housing 16 by threaded connection 11.
  • the metering valve 10 shown in Figure 1 is in the shut down condition with rib 92 on the flange of piston 72 seated on face 32 of cylindrical body 30 while rib 90 on the flange compresses projection 44 on elastomeric member 42 and ring 46 to statically seal bore 18 from the outlet port 22.
  • actuator solenoid 12 receives an input signal from ecu 15, shaft 70 provides an actuation force which moves piston 72 to allow fluid or fuel to flow from the inlet port 20 to the outlet port 22.
  • the input force from shaft 70 is communicated through wave washer or resilient member 80 to provide a smooth force which moves ribs 90 and 92 on piston 72 away from face 32 on cylindrical member 30 to allow fluid or fuel to flow from inlet port 20 to outlet port 22 by way of openings 52, 52'...52 n in end cap 48, annular opening 33 in cylindrical body 30, past seat on face 32 and through openings 61 in sleeve 60 as shown in Figure 4.
  • Spherical surface on nut 78 and guide 28 aids in directing the flow of fuel through openings 31 without the creation of turbulence.
  • the pulling or cavitation force of the fuel or fluid as it flows through opening 33 which attempts to displace the elastomeric member 42 from groove 38 is overcome through the constant resilient engagement of retaining ring 46 by end 62 of sleeve 60.
  • a closure spring When ecu 15 supplies actuation solenoid 12 with a termination signal, a closure spring provides a force which moves shaft 70 and piston 72 toward seat or face 32 on cylindrical member 30 in bore 18. As piston 72 approaches face 32, rib 90 on the flange moves past openings 31 in sleeve 60 to initiate termination of fuel flow from inlet port 20 to the outlet port 22 through bore 18. Thereafter, rib 90 contacts projection 44 on the elastomeric member 42 to compress the elastomeric member 42 into groove 38 prior to engagement with ring 46. Thereafter, rib 92 is seated on face 32 to form a static seal that completely terminates communication of fuel from bore 18 to outlet port 22 through opening 33.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Check Valves (AREA)

Abstract

Agencement d'étanchéité pour vanne de dosage dans lequel un élément cylindrique (30) comporte une gorge (38) située sur une face adjacente à un siège entourant une overture raccordée à un orifice d'admission (20). Un élément élastomère comporte une base située dans la gorge (38) avec une saillie s'étendant au-delà de la face située sur l'élément cylindrique. Une bague est maintenue de manière souple contre l'élément élastomère par un manchon (60) afin de former un premier joint statique entre l'élément cylindrique, la bague de rétention et le manchon. Un piston (72) situé dans le manchon comporte un rebord (90) sur lequel se trouvent des première et seconde nervures séparées par un évidement (94). Un élément d'entrée positionne le piston (77) de manière que la première nervure vienne en contact avec la saillie et comprime l'élément élastomère avant que la seconde nervure ne vienne en contact avec le siège afin de former un joint statique entre le piston et l'élément cylindrique, de manière à assurer que l'écoulement fluide entre un orifice d'admission et un orifice de sortie (22) s'arrête lorsque le piston se trouve en position de fermeture. L'évidement situé sur le piston ménage un espace permettant à la matière élastomère de s'écouler sans détériorer la saillie, lorsque la première nervure vient au contact de la bague et la seconde nervure vient au contact du siège.
PCT/US1992/000476 1991-02-12 1992-01-21 Agencement d'etancheite pour vanne de dosage WO1992014088A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4505391A JPH06505324A (ja) 1991-02-12 1992-01-21 計量バルブ用シール構成

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/654,141 US5118075A (en) 1991-02-12 1991-02-12 Seal arrangement for a metering valve
US654,141 1991-02-12

Publications (1)

Publication Number Publication Date
WO1992014088A1 true WO1992014088A1 (fr) 1992-08-20

Family

ID=24623604

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/000476 WO1992014088A1 (fr) 1991-02-12 1992-01-21 Agencement d'etancheite pour vanne de dosage

Country Status (5)

Country Link
US (1) US5118075A (fr)
EP (1) EP0571468A1 (fr)
JP (1) JPH06505324A (fr)
AU (1) AU646930B2 (fr)
WO (1) WO1992014088A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5676339A (en) * 1995-03-13 1997-10-14 Simon; Hans Easily removable cable strain relief device
US6024121A (en) * 1998-12-23 2000-02-15 Flomatic Corporation Check valve
US6520755B1 (en) 2000-10-10 2003-02-18 Beckman Coulter, Inc. Fluid-moving device with integrated valve
WO2003014603A2 (fr) * 2001-07-25 2003-02-20 Bosch Rexroth Ag Systeme de buse d'amortissement
CA2988251C (fr) 2015-06-03 2020-10-27 Flowserve Management Company Soupape de commande de decokage a l'aide d'un joint de tige dynamique
US10428743B2 (en) 2017-03-07 2019-10-01 Hamilton Sundstrand Corporation Drop-tight spool and sleeve for metering valve
US10830358B2 (en) * 2019-04-15 2020-11-10 Fisher Controls International Llc Valve trim having adjustable fluid flow characteristics and related methods
US11421600B1 (en) 2021-03-26 2022-08-23 Hamilton Sundstrand Corporation Fuel supply system with combined metering and shutoff valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694406A (en) * 1952-11-14 1954-11-16 Edgar H Ayers Constant flow fuel valve
US3964516A (en) * 1975-09-09 1976-06-22 Dresser Industries, Inc. Flow control valve for decoking
US4397331A (en) * 1978-09-29 1983-08-09 Honeywell Inc. Fluid flow control valve with maximized noise reduction
US4876857A (en) * 1988-08-15 1989-10-31 Allied-Signal Inc. Shut off/pressure regulating valve for turbine engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2464400A (en) * 1944-08-22 1949-03-15 Air Reduction Combined line and check valve
US3051196A (en) * 1958-10-24 1962-08-28 Prec Equipment Co Inc Check valve
US3549121A (en) * 1967-06-09 1970-12-22 Jacques H Mercier Valve
US4966193A (en) * 1990-01-30 1990-10-30 Allied-Signal Inc. Timing control for a dual poppet valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694406A (en) * 1952-11-14 1954-11-16 Edgar H Ayers Constant flow fuel valve
US3964516A (en) * 1975-09-09 1976-06-22 Dresser Industries, Inc. Flow control valve for decoking
US4397331A (en) * 1978-09-29 1983-08-09 Honeywell Inc. Fluid flow control valve with maximized noise reduction
US4876857A (en) * 1988-08-15 1989-10-31 Allied-Signal Inc. Shut off/pressure regulating valve for turbine engine

Also Published As

Publication number Publication date
AU646930B2 (en) 1994-03-10
AU1255692A (en) 1992-09-07
EP0571468A1 (fr) 1993-12-01
JPH06505324A (ja) 1994-06-16
US5118075A (en) 1992-06-02

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